199961459 has 2 divisors, whose sum is σ = 199961460. Its totient is φ = 199961458.

The previous prime is 199961449. The next prime is 199961483. The reversal of 199961459 is 954169991.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 199961459 - 2¹² = 199957363 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 199961459.

It is not a weakly prime, because it can be changed into another prime (199961449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99980729 + 99980730.

It is an arithmetic number, because the mean of its divisors is an integer number (99980730).

Almost surely, 2^199961459 is an apocalyptic number.

199961459 is a deficient number, since it is larger than the sum of its proper divisors (1).

199961459 is an equidigital number, since it uses as much as digits as its factorization.

199961459 is an evil number, because the sum of its binary digits is even.

The product of its digits is 787320, while the sum is 53.

The square root of 199961459 is about 14140.7729279555. The cubic root of 199961459 is about 584.7659803735.

The spelling of 199961459 in words is "one hundred ninety-nine million, nine hundred sixty-one thousand, four hundred fifty-nine".